DE202010016248U1 - container closure - Google Patents

Abstract

A closure for a container (1) having a lid (10) and a container body (20), with a first closing portion (11) forming part of the lid (10) and a second closing portion (21) forming part of the container body (20). wherein the first closing portion (11) and the second closing portion (21) together form a snap-lock by which the lid (10) is releasably lockable to the container body (20) to close it, characterized in that the first closing portion (11 ) and the second closing portion (21) together also form a bayonet closure, through which optionally the lid (10) on the container body (20) is releasably lockable to close this.

Description

The present invention relates to a closure for a container having a lid and a container body, comprising a first closing portion forming a part of the lid and a second closing portion forming part of the container body, wherein the first closing portion and the second closing portion together form a snap fit through which the lid is releasably lockable on the container body to close it. Furthermore, the invention relates to a reversibly veschließbaren container with such a lid and such a container body.

A consisting of a lid and a base body container, for. As a can made of thin-walled plastic, can usually be mechanically closed in a relatively uncomplicated way by pressing together cover and body, z. B. by a snap closure, because in this case only a movement perpendicular to the lid level is required. Often, however, it is not practical for a user or end user to reopen such a closure. Because it is a lock, in which an elastic deformation takes place, a minimum of force must be expended. The opening or closing can usually not be done without knotting, twisting or compression of the container, especially if it is made of a material thin wall thickness. In any case, however, it requires some concentration and skill to open or close a thin-walled plastic container, especially if a reasonably tight reversibly openable closure is to be present. At least full attention is required. This is impractical in a number of applications, which is shown here using the example of a disposable olive oil pickled container.

The user buys z. As olives in the market or in the supermarket already finished in the container packed from the refrigerator, the packaging z. This can also be done directly at the fresh produce counter, put the olives in the fridge at home, and would like to remove more of the olives in the following days. If the container is well filled, it may happen that olive oil or other fluid escapes when opening due to a required force and consequent compression or other distortion of the container. As a result, the container, in particular the snap closure may also be easily damaged. After more frequent opening and closing, the container may then become so unstable that the closure does not function properly, may not seal well, and the problems just described are even more pronounced. The user will then want to refrain from such containers rather, especially if he has little manual skill.

If one considers that the packaging industry, for reasons of environmental protection or simply for reasons of material costs, endeavors to make the wall thickness of such containers as thin as possible, it becomes clear that it is advantageous if a force required for opening or closing occurs be kept as small as possible, without diminishing the sealing effect of the snap closure. The closure is usually made of the same material as the container itself. A boundary condition with these containers is therefore that there is a direct relationship between the container material and the properties of the closure, in particular the force to be expended when opening or closing, but also where applicable. when the container is closed continuously applied force, for example, to achieve a good sealing effect. When designing these containers, a compromise has to be found between the material costs and the properties of the closure.

It is an object of the present invention to provide a flexible and reversible insertable closure for easy manual opening and closing of a container. Furthermore, it is an object of the present invention to enable the machine closure of a container in a simple manner. It is also an object of the present invention to provide a reusable closure for thin-walled containers which can be used in a gentle manner.

According to the invention, there is provided a closure for a container having a lid and a container body, with a first closing portion forming part of the lid and a second closing portion forming part of the container body, the first closing portion and the second closing portion forming a snap-fit together, through which Lid releasably lockable on the container body to close it, which is proposed according to the invention that the first closing portion and the second closing portion together form a bayonet closure, by the optional lid on the container body is releasably lockable to close this.

As a result, the container is closed by a plug movement of the lid relative to the container body at least positively or optionally by a following on the plug movement rotational movement in a form-fitting manner in a more effective manner and in opposite order to open. The snap connection can at least partially produce a positive effect, namely z. Example, when the first closing portion at the second closing portion in the region of the snap closure not only rests on friction, but also encompasses this or somehow undercuts.

In this case, locking lugs or other intended for the design of the bayonet edge portions are so on the second closing portion, d. H. formed the closure region of the container body that can be realized with these a snap closure. Recesses are formed between the edge regions or latching noses, which serve to be able to plug geometrically correspondingly dimensioned regions of the lid, which ensure the bayonet closure in the assembled and screwed-in position, over the edge region on the container body.

At the first closing portion, d. H. Notches may be provided in the closing region of the lid, which form a stop against latching lugs of the container body when the lid is rotated relative to the container body. In spite of the positive bayonet closure, a closure according to the invention can also function alone as a snap closure, in particular in an alignment of the lid with respect to the container body, in which a respective notch or other inwardly directed concave curvature is arranged next to that locking nose of the container body, to which the respective notch for Preventing twisting. This results in the advantage that the container can continue to be closed mechanically in a simple, easily automatable manner, but it can be opened and closed again later, often with frequent opening and closing by a user, without appreciable force.

Furthermore, advantageously, a container with a closure according to the invention can be opened or closed much more frequently without it being damaged or the connection between the lid and the container body becoming leaky. This also applies to very thin-walled containers. Because a user can open the container alone on the bayonet lock gently and close. Thus, there is also the advantage that a container according to the invention can be designed with a thin wall thickness, without losing reliability or tightness.

Depending on the exemplary embodiment, the closing section of the lid or container body can be completely circumferential or extend only over a partial section of the peripheral line of the lid or container body. The lid and the container body can have a circular cross-section, at least in the area of the respective closing section, in plan view. This may result in multiple orientations of the lid relative to the container body in which the container can be closed. However, the geometry of the lid or container body may also differ from the geometry of the respective closing portion. It is also possible that the respective closing portion z. B. is only circular over a partial section along the circumference, that is part-circular formed only in the region of the bayonet closure.

Both in the region of the snap closure and in the region of the bayonet closure, at least in part an inward-pointing projection may be present on the first closing section. The projection may be formed as an undercut or constriction or curvature inward, so that a narrowed in diameter area is formed. At the portion which forms the snap closure, the projection may be made partially elliptical or partially circular in cross section. In this case, adhesion between the lid and the container body when the container is closed may be present in that the projection acts from below and / or laterally from the outside against the container body, in particular against a second bearing surface of the container body. The projection may be provided running continuously over the respective section in the circumferential direction of the lid, so that it forms at least a part of an edge region of the lid, which surrounds the second closing section with the container closed. In the event that the projection is optionally formed by individual, circumferentially juxtaposed vaults, it may also be provided superimposed with other inwardly facing shapes or areas in the sense of concave curvatures.

The projection can also be provided along the entire circumference, so that regardless of the orientation of the lid relative to the container body, an at least approximately tight closure can be realized via the snap mechanism. This can be z. B. be useful if, regardless of the orientation of the lid relative to the container body in each case a very smooth snap closure should be present, which is additionally locked only when needed by the bayonet lock. This is z. B. in a container of advantage, which is placed on a dining table, so that people can use this container and can easily open and close it regardless of the orientation of the lid relative to the container body. If the container is no longer needed, it can, for. B. in a refrigerator despite the smooth Snap closure are largely densely incorporated by means of the bayonet closure.

The first closing portion, d. H. the closure region of the lid may have an engaging portion, which when the container is closed, the second closing portion, d. H. the closure region of the container body so laterally encloses that a force or positive and positive snap connection is formed. For this purpose, the engagement section can be designed in such a way that, in cross-section, it has an outwardly, ie convexly curved, contour and a larger diameter than the second closing section. As a result, in any orientation of the lid relative to the container body, the lid can be pressed onto the container body. The engagement portion may comprise the projection, i. H. In some cases, however, it may also be curved concavely inwards, but in this case also has a larger diameter in the edge region of the container body than any latching lugs on the container body.

For pressing the engagement portion can be carried out by itself or in combination with the container body provided latching lugs, which are encompassed by the engagement portion of the lid with a closed container in a yielding force, correspondingly elastic material. Of course, the entire container can be made of a single material, in particular plastic. According to one embodiment, the lid is made of a thinner-walled plastic than the container body, so that the engagement portion of the lid is more resilient than the latching noses of the container body. Also, the locking lugs may have a higher wall thickness in relation to other areas of the container body.

According to one embodiment, the aforementioned projections may be arranged on the engagement portion. Furthermore, first, circumferentially extending concave areas and second, z. B. at least approximately punctiform concave areas may be provided on the engaging portion. The first concave portions serve as part of the bayonet closure substantially to exclude a detachment of the lid without rotation relative to the container body by being pushed by a rotational movement under the locking lugs. The second concave areas are more punctiform and can be regarded as belonging to the snap closure, since they are smaller than the first areas and therefore can be brought by a plug movement without twisting behind or under the locking lugs.

The container can therefore be a box and this can be designed as a round box, wherein the locking lugs of the bayonet lock can be arranged rotationally symmetrical along the circumference of the container.

According to one embodiment, the non-positive snap connection between the engagement portion and the second closing portion can be produced only in an orientation of the lid relative to the container body, in which a positive connection via the bayonet lock can be produced. The lid may rest on the container body and establish the adhesion from the outside to the outer surface of the container body.

Appropriately, regardless of the other material of the lid or container body, the entire first and / or the second closing portion may be made of a material which has a specific flexibility or elasticity and can be elastically deformed. About the elastic properties can be adjusted in terms of force or positive locking.

The first closing portion may have a substantially planar in a plane extending first bearing surface on which the lid can rest on the container body and against the container body can be rotated. Furthermore, the second closing portion may also have a substantially planar in a plane extending second support surface on which the lid can be placed.

Locking lugs on the container body may be formed by the first bearing surface of the container body, in particular also by the fact that in the first bearing surface recesses are incorporated. The first contact surface can therefore form a latching nose or positive-locking surface of the bayonet closure by having a width which differs in the radial direction along the circumference of the container body and thereby assumes at least two defined width values. It can be formed two opposite locking lugs or optionally at least three locking lugs. The container body can also z. B. has four rotationally symmetrical locking lugs, z. B. in a circular basic shape of the container body.

The first bearing surface and / or the second bearing surface may also be designed as a sealing surface, via which a seal against fluid such as water or oil or an air-tight seal can be produced. The sealing surface may be characterized in that it has a specific Surface roughness and / or provided with a specific coating.

The first bearing surface and / or the second bearing surface can also be designed as a surface with a low coefficient of friction. According to an embodiment, in particular in a first bearing surface and / or second bearing surface with a low coefficient of friction, a one-handed opening or closing by turning the lid relative to the container body is possible, so by the bayonet lock, especially if the container is well filled and therefore a certain Has dead weight, or if the container is parked on a largely flat surface. Thus, for example, in the use and processing of z. B. Cream cheese, the container of cream cheese by a chef with one hand to be opened and removed with the other cream cheese and the container immediately closed again, which can be done much faster than if the container must first be taken with both hands to him open, and then must be stored again to then take a spoon or the like kitchen instrument for removing cream cheese can.

The container body may have a non-slip base surface, due to which it can be effectively prevented that the container body rotates together with the lid when it is rotated in particular with one hand relative to the container body. The surface of the base is advantageously so rough or can effectively transfer a frictional force that is largely independent of the nature of a surface on which the container stores, between the base and the second support surface, a higher frictional force can be transmitted as between the lid and the container body.

The second closing portion may form with the engaging portion in cross-section a Z-shaped profile, wherein the first bearing surface forms the upper horizontally oriented and outwardly facing leg of the Z. According to one embodiment, the diagonally extending middle leg of the Z-shaped profile of the container body has at least approximately a height corresponding to the height of the engagement portion of the lid. The central leg of the Z-shaped profile may be diagonal, in particular inclined inwards from the bottom, but it may also extend substantially vertically, so that it is more likely to speak of a double L-shaped profile than a Z-profile.

According to one embodiment, the first closing portion has in cross-sections along its circumference at least three different cross-sectional profiles, which differ substantially in the region of the first bearing surface and in the region of the transition from the first bearing surface to the engagement portion. One of the three cross-sectional profiles may be formed by the aforementioned substantially point-shaped concave portions in the form of indentations or indentations, by means of which a snap connection can be made independently of a bayonet connection. A further cross-sectional profile may be formed in the region of the first concave regions, and a third cross-sectional profile may be present in the region of the indentations. The profile of the first closing portion may thus be formed in cross-section at least approximately as a profile which has an inclination to the outside and in which the differences in the at least three different cross-sectional profiles result in that there are more or less inwardly pointing notches or has concave curvatures.

It can also be provided more than three cross-sectional profiles, so that the container can be closed, depending on the orientation of the lid relative to the container body, for example, with a higher or lower closing force on the snap connection. The first closing portion may terminate downwardly in the direction of the container body with an outwardly directed, in particular continuous circumferential edge. However, the peripheral edge can also be folded inward or turned over or crimped, so that it clearly surmounted the outer diameter of the second closing portion, but has a round outer contour and thus is well in the hand and also does not form projections to which the container could get stuck somewhere.

On the lid, any notches forming an anti-rotation may extend over the entire height of the cross-sectional profile, and may have a depth corresponding to the depth of the first concave portion.

According to one embodiment, one of three cross-sectional profiles or a further cross-sectional profile of the first closing portion of the lid, in particular the one which ensures locking against arranged on the container body locking lugs, formed with in the circumferential direction of the lid inclined or angled extending projection in the manner of a section thread , Such a projection can thus act as a sealing, inwardly directed, ie concave curvature at a rotation, which causes a seal between the two bearing surfaces at a twisting for closing increasingly. This allows the Lid upon closure in a rotation relative to the container body with increasing rotational angle are pressed more strongly against the container body and thus an increasing sealing effect on the first bearing surface and the second bearing surface can be achieved. Depending on the nature of the support surfaces, an approximately airtight closure or an at least substantially watertight closure can be realized in this way.

The connection of the lid to the container body can thus take place with a good sealing effect, the bayonet mechanism in particular by means of superimposed bearing surfaces whose surfaces may be formed from a suitable material for a sealing surface pairing, and the snap-action mechanism in particular by the fact that the projection on non-positively the second bearing surface acts in the region of the latching nose, in particular from the side and / or from below.

According to one embodiment, the first closing portion has a web which in cross-section has the shape of an inverted U-profile, and which is adapted to receive the pressure forces exerted on the lid to make a snap connection and to forward them to the engaging portion. In this way, a good stability of the lid can be ensured. Furthermore, it can be ensured that, in particular when the container is being opened, the deformations and applied forces generated by a user on the engagement portion are essentially intercepted and damped by the web and do not lead to a deformation of the entire lid. As a result, a substantially flat surface of the lid remains reasonably level, d. h., The flat surface is z. B. not on the stored medium such. B. cream cheese pressed in the container body and therefore not so easily contaminated. That this can be an advantage, is shown for. B. for a container of transparent material, because with a clean lid, especially clean inner surface, can be seen through the lid and be determined without opening the container, to what degree the container is still filled.

According to one embodiment, the web goes outwardly into a shoulder, which can form a first bearing surface. In this way, a two-stage mechanism can be provided in which two superposed projections or bulges are present at the first closing portion. In this case, it is possible to produce a slight snap connection via the first projection, and a second possibly safer or closer connection can take place via the second projection designed in the form of an indentation. It remains free whether a bayonet closure is provided at the first and / or at the second connection. Conveniently, the web can be performed circumferentially and take over the function of a reinforcing bead.

The web in the form of the inverted U-profile can in the vertical direction, d. H. in a direction substantially orthogonal to the base of the container body having dimensions substantially equal to the dimensions of the engaging portion, be it in height or in width. In this case, the web can be arranged offset relative to the engagement portion inwardly and be formed to stabilize the lid and to facilitate a plugging movement for opening or closing the container by supporting a thumb or a palm on the web.

The web can delimit a central region of the lid, which is formed by a substantially flat, planar surface which is arranged at least approximately at the level of the first bearing surface. In this way, a good stability of the lid can be ensured.

The lid and the container body may be made of a plastic material. The plastic material may be in elastic and / or thin-walled design. The container body and / or the cover may be made of a thermoplastic material, in particular thermoforming sheet material. As a result, containers with a closure according to the invention can be automated in a simple manner and produced inexpensively.

The container can be closed by pressing the lid on the container body. As a result, a rotation of the lid relative to the container body is not necessarily required, and the production line can be simple and cost-effective and / or high numbers of units can be realized per unit of time. For this purpose, the lid is aligned with respect to the container body in a specific orientation, for. B. with respect to locking lugs of the container body, before pressing each other takes place. When closing the container, a force in the region of a provided on the cover web can be initiated. This has the advantage that the power transmission is initiated on a torsionally rigid or dimensionally stable part of the lid.

By the following description of the figures, the invention will be explained with reference to embodiments even further. Show it

1 a side perspective view of a container with an open lid according to a preferred embodiment of the invention;

2a a plan view of the container body of a container according to 1 ;

2 B a sectional view of the container body of a container according to that in the 2a drawn section AA;

3a a plan view of the lid of a container according to 1 ;

3b Sectional views of the lid of a container according to those in the 3a drawn cutting lines;

4a a side view of a container closed by the lid according to a further embodiment of the invention; and

4b a detailed view 4a ,

In the 1 is a container body 20 together with a lid 10 shown. On the lid 10 is a first closing section 11 formed in the form of a circumferential and downwardly directed and at the same time outwardly inclined edge portion and on the container body 20 a second closing section 21 recognizable. cover 10 and container body 20 make up the container 1 , On the lid 10 are first concave areas 18a recognizable, which sections along the circumference of the lid 10 present and in their arrangement approximately with the arrangement of recesses 25 on the container body 20 to match. Also, second concave areas 18a recognizable, which are at least approximately formed point or circular and a snap connection largely independent of the orientation of the lid 10 to the container body 20 can ensure. On the lid 10 are also notches 19 recognizable, which on one side of the first concave areas 18a are arranged and in which the first concave areas 18a pass. The notches 19 prevent too much, ie too much twisting. Depending on which side of the first concave areas 18a the notches 19 are provided, ie whether right or left, it is determined in which direction twisting can be done to open or close the container. Usually the notches are 19 provided so that closing can be done in a clockwise direction. The recesses 25 are between locking lugs 24 arranged or are formed by the locking lugs and vice versa. In the area of locking lugs 24 and also in the area of the recesses 25 there is a second contact surface 22 in front. This second bearing surface 22 can through the surface of the locking lugs 24 or the edge region of the recesses 25 be formed.

The 2a shows in plan view the container body 20 , which four locking lugs 24 having. The locking lugs 24 are rotationally symmetric along the circular perimeter of the approximately cylindrical container body 20 arranged. The locking lugs 24 have a slightly greater radial extent along the circumference than the recesses or cut-out areas 25 between the locking lugs 24 , The second closing section 21 is shown as a Z-shaped profile, and the uppermost leg of the Z forms the support surface 22 , This is the bearing surface 22 formed to a significant extent by the pitch circle sections, in which the locking lugs 24 available. The locking lugs 24 However, can also be designed with a smaller radial width. The container body 20 has a base 23 which can be designed with a surface with high static friction.

The 2 B shows the container body 20 in the in 2a indicated sectional view AA. At the second closing section 21 in the form of a flange-like edge region is the second bearing surface 22 recognizable, which opposite the bottom surface 23 is aligned substantially parallel. The second bearing surface 22 is arranged in a plane plane. As a result, a plane or surface is formed, on which the lid 10 (see. 1 ) on the container body 20 can be rotatably supported, so that a low-friction rotation of a lid relative to the container body 20 can be ensured. The second bearing surface 22 However, it can also be inclined to the base area 23 be provided. The snap closure is realized in the illustrated embodiment in that a snap connection between the locking lugs 24 , and the first and / or second concave areas 18a . 18b will be produced.

The 3a shows the lid 10 in plan view and indicates the location of three sectional views, which in 3b are shown in detail. In the sectional view BB is a profile of the lid 10 recognizable, which has an engaging portion 13 wherein the downwardly extending surfaces are flared so that a container body is overlapped in the radial direction. The engaging section 13 is adjacent to the first bearing surface 12 at the bottom or the container body 20 facing side of the lid 10 arranged, stands from this and is opposite to a substantial part of the lid 10 forming flat surface 17 tilted outwards. The lid 10 has at its top or from the container body 20 further away a circumferential web 16 on, which is here in the form of an inverted U-profile. The jetty 16 is close to the engagement section 13 arranged so that one on the jetty 16 applied pressure, z. From a user or from a packaging machine, looks well on the engaging portion 13 can forward.

It can be seen in the section CC that the cross-sectional profile differs from the section BB in that the engagement section 13 an outwardly inclined profile with a fully developed first concave area 18a having. About this profile, the positive connection for the bayonet lock can be made. The first concave area 18a goes into a lead 15 over or is part of this. The strength of the curvature of the projection 15 defines the force with which the lid 10 over the snap lock on the container body (see. 2a . 2 B ) must be pressed.

The section DD shows another cross-sectional profile in which the projection 15 in that it now distinguishes the second concave area 18b includes, wherein the projection 15 with a greater curvature than in section BB, but with a slightly more moderate curvature than in section CC. The section DD is performed at a position where the lid 10 relative to the container body can exert a frictional connection and / or positive connection in the sense of a snap connection, in particular via the second concave areas 18b in connection with locking lugs on the container body (see. 2a . 2 B ).

The 4a shows a container 1 with a closure according to the invention according to a further embodiment. A detail is in 4b played. 4b shows in section a part of the lid 10 and the container body 20 , where the lid 10 one shoulder 12a and a dent 15a having. The engaging section 13 is shared here by the indentation 15a and the lead 15 educated.

According to the embodiment of 4 is a two-stage closure possible, on the one hand as shown in a situation in which the projection 15 laterally and / or from below against the second support surface 22 on the other hand, in a situation in which the second bearing surface 22 between the indentation 15a and the shoulder 12a is brought to the plant. As shown, the indentation 15a more inwardly curved than the projection 15 , so that in the second layer of the second bearing surface 22 a stronger connection between the lid and the container body results or more force is spent to make or disconnect the connection.

LIST OF REFERENCE NUMBERS

1

container

10

cover

11

first closing section

12

first contact surface

12a

shoulder

13

engaging portion

15

head Start

15a

indentation

16

web

17

flat surface

18a

first concave area

18b

second concave area

19

notch

20

container body

21

second closing section

22

second bearing surface

23

Floor space

24

locking lug

25

recess

Claims (12)

Closure for a lid ( 10 ) and a container body ( 20 ) container ( 1 ), with a part of the cover ( 10 ) forming the first closing section ( 11 ) and a part of the container body ( 20 ) forming second closing section ( 21 ), wherein the first closing section ( 11 ) and the second closing section ( 21 ) together form a snap closure through which the lid ( 10 ) detachable on the container body ( 20 ) is lockable to close this, characterized in that the first closing portion ( 11 ) and the second closing section ( 21 ) together also form a bayonet closure, through which the lid ( 10 ) on the container body ( 20 ) is releasably lockable to close this. Closure according to claim 1, characterized in that both in the region of the snap closure and in the region of the bayonet closure on the first closing portion ( 11 ) at least in part an inward pointing projection ( 15 ) is provided. Closure according to claim 1 or 2, characterized in that the first closing portion ( 11 ) an engaging portion ( 13 ) which, when the container is closed ( 1 ) the second closing section ( 21 ) surrounds laterally such that a frictional snap connection is formed. Closure according to claim 3, characterized in that the frictional snap connection between the engaging portion ( 13 ) and the second closing section ( 21 ) only in one orientation of the lid ( 10 ) relative to the container body ( 20 ) can be produced, in which also a positive connection via the bayonet lock can be produced. Closure according to one of the preceding claims, characterized in that the first closing portion ( 11 ) and the second closing section ( 21 ) are made of a material which has a compliance and is elastically deformable. Closure according to one of the preceding claims, characterized in that the first closing portion ( 11 ) a substantially planar in a plane extending first support surface ( 12 ), on which the lid ( 10 ) on the container body ( 20 ) and against the container body ( 20 ), and the second closing portion (FIG. 21 ) a substantially plane in a plane extending second support surface ( 22 ), on which the lid ( 10 ) can be placed. Closure according to claim 6, characterized in that the first bearing surface ( 12 ) and / or the second bearing surface ( 22 ) is designed as a sealing surface. Closure according to claim 6 or 7, characterized in that the first bearing surface ( 12 ) and / or the second bearing surface ( 22 ) is designed as a surface with a low coefficient of friction. Closure according to one of the preceding claims, characterized in that the first closing portion ( 11 ) of the lid ( 10 ) at least one inwardly directed, preferably inwardly inclined or angled, projection ( 15 ) and the second closing section ( 21 ) of the container body ( 20 ) at least one outwardly projecting latch ( 24 ), with which the projection ( 15 ) can be brought into releasably latching engagement. Closure according to one of the preceding claims, characterized in that the lid ( 10 ) and the container body ( 20 ) are made of plastic material. Closure according to one of the preceding claims, characterized in that the container body ( 20 ) and / or the lid ( 10 ) is made of thermoforming sheet material. Reversible lockable container ( 1 ) with a lid ( 10 ) and a container body ( 20 ), characterized in that the container ( 1 ) has a closure according to one of the preceding claims.

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